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Facsimile (Giunti, Florence 1986); ca. 1493-94; 10.5x8 cm
This "pocket-book" consists of three different notebooks totaling 142 leaves. Principally, these contain studies of water, especially of the erosive effects of vortices and currents. There is also a series of calculations for the excavation of the navigable Martesana Canal between Lecco and Milan, as well as notes of Latin grammar, geometry and hydraulics.
fols. 29v-30r: Chariot and clock mechanisms (left); study on transmission of movement by means of a toothed-wheel and a rack (right).
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Leonardo da Vinci
Study for a viol